Introduction: Small bowel injury is a known entity following blunt trauma abdomen due to mesenteric tears or ischaemia, however colonic injury due to blunt abdominal trauma is a rare occurrence. Here we present a case of blunt abdominal trauma in which the patient presented with signs of perforation peritonitis 10 days after trauma after initially being managed conservatively. Case Presentation: A 35-year-old male presented with a history of high velocity blunt trauma abdomen following a road traffic accident. The clinical features were not suggestive of perforation peritonitis. Following a positive e-FAST, contrast enhanced CT scan of the abdomen was performed, which showed moderate ascites, mesenteric fat stranding and no evidence of solid organ or bowel injury. The patient was managed conservatively for 7 days following acceptance of oral diet and passage of stool and was discharged. He then presented again to the emergency department 4 days following discharge with signs of peritonism. During the exploratory laparotomy, a sigmoid colon perforation along with gangrenous segment of about 5-8 cm with gross faecal contamination was found. Hartmann’s procedure was done and the patient was discharged on postoperative day 7. Conclusion: Delayed presentation of colonic perforation following blunt abdominal trauma is a rare occurrence and a high index of suspicion and vigilant care is needed to diagnose and adequately treat the same.